0ef33a094b
1. ${ROFF} is run in ${.OBJDIR}. 2. the preprocessor prefixes ${SRCDIR}/ to relative pathnames in `.so' statements. This is useful when running ${ROFF} in the source directory isn't convenient. Added dependencies on ${EXTRA} and ${OBJS}. These are usually for files that are sourced indirectly. ${OBJS} is for files that are built. 4.4lite has decentalized incomplete dependencies on ${EXTRA} and ${DPADD}. These were broken by are centralized handling of the roff targets.